diff options
| -rw-r--r-- | include/llvm/Support/PathV1.h | 407 | ||||
| -rw-r--r-- | lib/Support/CMakeLists.txt | 3 | ||||
| -rw-r--r-- | lib/Support/Path.cpp | 78 | ||||
| -rw-r--r-- | lib/Support/Unix/Path.inc | 496 | ||||
| -rw-r--r-- | lib/Support/Windows/Path.inc | 587 |
5 files changed, 0 insertions, 1571 deletions
diff --git a/include/llvm/Support/PathV1.h b/include/llvm/Support/PathV1.h deleted file mode 100644 index 17c9e92656..0000000000 --- a/include/llvm/Support/PathV1.h +++ /dev/null @@ -1,407 +0,0 @@ -//===- llvm/Support/PathV1.h - Path Operating System Concept ----*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file declares the llvm::sys::Path class. -// -//===----------------------------------------------------------------------===// - -#ifndef LLVM_SUPPORT_PATHV1_H -#define LLVM_SUPPORT_PATHV1_H - -#include "llvm/ADT/StringRef.h" -#include "llvm/Support/Compiler.h" -#include "llvm/Support/TimeValue.h" -#include <string> -#include <vector> - -#define LLVM_PATH_DEPRECATED_MSG(replacement) \ - "PathV1 has been deprecated and will be removed as soon as all LLVM and" \ - " Clang clients have been moved over to PathV2. Please use `" #replacement \ - "` from PathV2 instead." - -namespace llvm { -namespace sys { - - /// This structure provides basic file system information about a file. It - /// is patterned after the stat(2) Unix operating system call but made - /// platform independent and eliminates many of the unix-specific fields. - /// However, to support llvm-ar, the mode, user, and group fields are - /// retained. These pertain to unix security and may not have a meaningful - /// value on non-Unix platforms. However, the other fields should - /// always be applicable on all platforms. The structure is filled in by - /// the PathWithStatus class. - /// @brief File status structure - class FileStatus { - public: - uint64_t fileSize; ///< Size of the file in bytes - TimeValue modTime; ///< Time of file's modification - uint32_t mode; ///< Mode of the file, if applicable - uint32_t user; ///< User ID of owner, if applicable - uint32_t group; ///< Group ID of owner, if applicable - bool isDir : 1; ///< True if this is a directory. - bool isFile : 1; ///< True if this is a file. - - FileStatus() : fileSize(0), modTime(0,0), mode(0777), user(999), - group(999), isDir(false), isFile(false) { } - - TimeValue getTimestamp() const { return modTime; } - uint64_t getSize() const { return fileSize; } - uint32_t getMode() const { return mode; } - uint32_t getUser() const { return user; } - uint32_t getGroup() const { return group; } - }; - - /// This class provides an abstraction for the path to a file or directory - /// in the operating system's filesystem and provides various basic operations - /// on it. Note that this class only represents the name of a path to a file - /// or directory which may or may not be valid for a given machine's file - /// system. The class is patterned after the java.io.File class with various - /// extensions and several omissions (not relevant to LLVM). A Path object - /// ensures that the path it encapsulates is syntactically valid for the - /// operating system it is running on but does not ensure correctness for - /// any particular file system. That is, a syntactically valid path might - /// specify path components that do not exist in the file system and using - /// such a Path to act on the file system could produce errors. There is one - /// invalid Path value which is permitted: the empty path. The class should - /// never allow a syntactically invalid non-empty path name to be assigned. - /// Empty paths are required in order to indicate an error result in some - /// situations. If the path is empty, the isValid operation will return - /// false. All operations will fail if isValid is false. Operations that - /// change the path will either return false if it would cause a syntactically - /// invalid path name (in which case the Path object is left unchanged) or - /// throw an std::string exception indicating the error. The methods are - /// grouped into four basic categories: Path Accessors (provide information - /// about the path without accessing disk), Disk Accessors (provide - /// information about the underlying file or directory), Path Mutators - /// (change the path information, not the disk), and Disk Mutators (change - /// the disk file/directory referenced by the path). The Disk Mutator methods - /// all have the word "disk" embedded in their method name to reinforce the - /// notion that the operation modifies the file system. - /// @since 1.4 - /// @brief An abstraction for operating system paths. - class Path { - /// @name Constructors - /// @{ - public: - /// Construct a path to a unique temporary directory that is created in - /// a "standard" place for the operating system. The directory is - /// guaranteed to be created on exit from this function. If the directory - /// cannot be created, the function will throw an exception. - /// @returns an invalid path (empty) on error - /// @param ErrMsg Optional place for an error message if an error occurs - /// @brief Construct a path to an new, unique, existing temporary - /// directory. - static Path GetTemporaryDirectory(std::string* ErrMsg = 0); - - /// Construct a path to the current directory for the current process. - /// @returns The current working directory. - /// @brief Returns the current working directory. - static Path GetCurrentDirectory(); - - /// This is one of the very few ways in which a path can be constructed - /// with a syntactically invalid name. The only *legal* invalid name is an - /// empty one. Other invalid names are not permitted. Empty paths are - /// provided so that they can be used to indicate null or error results in - /// other lib/System functionality. - /// @brief Construct an empty (and invalid) path. - Path() : path() {} - Path(const Path &that) : path(that.path) {} - - /// This constructor will accept a char* or std::string as a path. No - /// checking is done on this path to determine if it is valid. To - /// determine validity of the path, use the isValid method. - /// @param p The path to assign. - /// @brief Construct a Path from a string. - explicit Path(StringRef p); - - /// This constructor will accept a character range as a path. No checking - /// is done on this path to determine if it is valid. To determine - /// validity of the path, use the isValid method. - /// @param StrStart A pointer to the first character of the path name - /// @param StrLen The length of the path name at StrStart - /// @brief Construct a Path from a string. - Path(const char *StrStart, unsigned StrLen); - - /// @} - /// @name Operators - /// @{ - public: - /// Makes a copy of \p that to \p this. - /// @returns \p this - /// @brief Assignment Operator - Path &operator=(const Path &that) { - path = that.path; - return *this; - } - - /// Makes a copy of \p that to \p this. - /// @param that A StringRef denoting the path - /// @returns \p this - /// @brief Assignment Operator - Path &operator=(StringRef that); - - /// Compares \p this Path with \p that Path for equality. - /// @returns true if \p this and \p that refer to the same thing. - /// @brief Equality Operator - bool operator==(const Path &that) const; - - /// Compares \p this Path with \p that Path for inequality. - /// @returns true if \p this and \p that refer to different things. - /// @brief Inequality Operator - bool operator!=(const Path &that) const { return !(*this == that); } - - /// Determines if \p this Path is less than \p that Path. This is required - /// so that Path objects can be placed into ordered collections (e.g. - /// std::map). The comparison is done lexicographically as defined by - /// the std::string::compare method. - /// @returns true if \p this path is lexicographically less than \p that. - /// @brief Less Than Operator - bool operator<(const Path& that) const; - - /// @} - /// @name Path Accessors - /// @{ - public: - /// This function will use an operating system specific algorithm to - /// determine if the current value of \p this is a syntactically valid - /// path name for the operating system. The path name does not need to - /// exist, validity is simply syntactical. Empty paths are always invalid. - /// @returns true iff the path name is syntactically legal for the - /// host operating system. - /// @brief Determine if a path is syntactically valid or not. - bool isValid() const; - - /// This function determines if the contents of the path name are empty. - /// That is, the path name has a zero length. This does NOT determine if - /// if the file is empty. To get the length of the file itself, Use the - /// PathWithStatus::getFileStatus() method and then the getSize() method - /// on the returned FileStatus object. - /// @returns true iff the path is empty. - /// @brief Determines if the path name is empty (invalid). - bool isEmpty() const { return path.empty(); } - - - - /// Obtain a 'C' string for the path name. - /// @returns a 'C' string containing the path name. - /// @brief Returns the path as a C string. - const char *c_str() const { return path.c_str(); } - const std::string &str() const { return path; } - - - /// size - Return the length in bytes of this path name. - size_t size() const { return path.size(); } - - /// empty - Returns true if the path is empty. - unsigned empty() const { return path.empty(); } - - /// @} - /// @name Disk Accessors - /// @{ - public: - /// This function determines if the path name in the object references an - /// archive file by looking at its magic number. - /// @returns true if the file starts with the magic number for an archive - /// file. - /// @brief Determine if the path references an archive file. - bool isArchive() const; - - /// This function determines if the path name in the object references a - /// native Dynamic Library (shared library, shared object) by looking at - /// the file's magic number. The Path object must reference a file, not a - /// directory. - /// @returns true if the file starts with the magic number for a native - /// shared library. - /// @brief Determine if the path references a dynamic library. - bool isDynamicLibrary() const; - - /// This function determines if the path name references an existing file - /// or directory in the file system. - /// @returns true if the pathname references an existing file or - /// directory. - /// @brief Determines if the path is a file or directory in - /// the file system. - LLVM_ATTRIBUTE_DEPRECATED(bool exists() const, - LLVM_PATH_DEPRECATED_MSG(fs::exists)); - - /// This function determines if the path name references an - /// existing directory. - /// @returns true if the pathname references an existing directory. - /// @brief Determines if the path is a directory in the file system. - LLVM_ATTRIBUTE_DEPRECATED(bool isDirectory() const, - LLVM_PATH_DEPRECATED_MSG(fs::is_directory)); - - /// This function determines if the path name references an - /// existing symbolic link. - /// @returns true if the pathname references an existing symlink. - /// @brief Determines if the path is a symlink in the file system. - LLVM_ATTRIBUTE_DEPRECATED(bool isSymLink() const, - LLVM_PATH_DEPRECATED_MSG(fs::is_symlink)); - - /// This function checks that what we're trying to work only on a regular - /// file. Check for things like /dev/null, any block special file, or - /// other things that aren't "regular" regular files. - /// @returns true if the file is S_ISREG. - /// @brief Determines if the file is a regular file - bool isRegularFile() const; - - /// @} - /// @name Path Mutators - /// @{ - public: - /// The path name is cleared and becomes empty. This is an invalid - /// path name but is the *only* invalid path name. This is provided - /// so that path objects can be used to indicate the lack of a - /// valid path being found. - /// @brief Make the path empty. - void clear() { path.clear(); } - - /// This method sets the Path object to \p unverified_path. This can fail - /// if the \p unverified_path does not pass the syntactic checks of the - /// isValid() method. If verification fails, the Path object remains - /// unchanged and false is returned. Otherwise true is returned and the - /// Path object takes on the path value of \p unverified_path - /// @returns true if the path was set, false otherwise. - /// @param unverified_path The path to be set in Path object. - /// @brief Set a full path from a StringRef - bool set(StringRef unverified_path); - - /// One path component is removed from the Path. If only one component is - /// present in the path, the Path object becomes empty. If the Path object - /// is empty, no change is made. - /// @returns false if the path component could not be removed. - /// @brief Removes the last directory component of the Path. - bool eraseComponent(); - - /// The \p component is added to the end of the Path if it is a legal - /// name for the operating system. A directory separator will be added if - /// needed. - /// @returns false if the path component could not be added. - /// @brief Appends one path component to the Path. - bool appendComponent(StringRef component); - - /// A period and the \p suffix are appended to the end of the pathname. - /// When the \p suffix is empty, no action is performed. - /// @brief Adds a period and the \p suffix to the end of the pathname. - void appendSuffix(StringRef suffix); - - /// The suffix of the filename is erased. The suffix begins with and - /// includes the last . character in the filename after the last directory - /// separator and extends until the end of the name. If no . character is - /// after the last directory separator, then the file name is left - /// unchanged (i.e. it was already without a suffix) but the function - /// returns false. - /// @returns false if there was no suffix to remove, true otherwise. - /// @brief Remove the suffix from a path name. - bool eraseSuffix(); - - /// The current Path name is made unique in the file system. Upon return, - /// the Path will have been changed to make a unique file in the file - /// system or it will not have been changed if the current path name is - /// already unique. - /// @throws std::string if an unrecoverable error occurs. - /// @brief Make the current path name unique in the file system. - bool makeUnique( bool reuse_current /*= true*/, std::string* ErrMsg ); - - /// The current Path name is made absolute by prepending the - /// current working directory if necessary. - LLVM_ATTRIBUTE_DEPRECATED( - void makeAbsolute(), - LLVM_PATH_DEPRECATED_MSG(fs::make_absolute)); - - /// @} - /// @name Disk Mutators - /// @{ - public: - /// This method attempts to make the file referenced by the Path object - /// available for reading so that the canRead() method will return true. - /// @brief Make the file readable; - bool makeReadableOnDisk(std::string* ErrMsg = 0); - - /// This method attempts to make the file referenced by the Path object - /// available for writing so that the canWrite() method will return true. - /// @brief Make the file writable; - bool makeWriteableOnDisk(std::string* ErrMsg = 0); - - /// This method allows the last modified time stamp and permission bits - /// to be set on the disk object referenced by the Path. - /// @throws std::string if an error occurs. - /// @returns true on error. - /// @brief Set the status information. - bool setStatusInfoOnDisk(const FileStatus &SI, - std::string *ErrStr = 0) const; - - /// This method attempts to create a directory in the file system with the - /// same name as the Path object. The \p create_parents parameter controls - /// whether intermediate directories are created or not. if \p - /// create_parents is true, then an attempt will be made to create all - /// intermediate directories, as needed. If \p create_parents is false, - /// then only the final directory component of the Path name will be - /// created. The created directory will have no entries. - /// @returns true if the directory could not be created, false otherwise - /// @brief Create the directory this Path refers to. - bool createDirectoryOnDisk( - bool create_parents = false, ///< Determines whether non-existent - ///< directory components other than the last one (the "parents") - ///< are created or not. - std::string* ErrMsg = 0 ///< Optional place to put error messages. - ); - - /// This is like createFile except that it creates a temporary file. A - /// unique temporary file name is generated based on the contents of - /// \p this before the call. The new name is assigned to \p this and the - /// file is created. Note that this will both change the Path object - /// *and* create the corresponding file. This function will ensure that - /// the newly generated temporary file name is unique in the file system. - /// @returns true if the file couldn't be created, false otherwise. - /// @brief Create a unique temporary file - bool createTemporaryFileOnDisk( - bool reuse_current = false, ///< When set to true, this parameter - ///< indicates that if the current file name does not exist then - ///< it will be used without modification. - std::string* ErrMsg = 0 ///< Optional place to put error messages - ); - - /// This method renames the file referenced by \p this as \p newName. The - /// file referenced by \p this must exist. The file referenced by - /// \p newName does not need to exist. - /// @returns true on error, false otherwise - /// @brief Rename one file as another. - bool renamePathOnDisk(const Path& newName, std::string* ErrMsg); - - /// This method attempts to destroy the file or directory named by the - /// last component of the Path. If the Path refers to a directory and the - /// \p destroy_contents is false, an attempt will be made to remove just - /// the directory (the final Path component). If \p destroy_contents is - /// true, an attempt will be made to remove the entire contents of the - /// directory, recursively. If the Path refers to a file, the - /// \p destroy_contents parameter is ignored. - /// @param destroy_contents Indicates whether the contents of a destroyed - /// @param Err An optional string to receive an error message. - /// directory should also be destroyed (recursively). - /// @returns false if the file/directory was destroyed, true on error. - /// @brief Removes the file or directory from the filesystem. - bool eraseFromDisk(bool destroy_contents = false, - std::string *Err = 0) const; - - /// @} - /// @name Data - /// @{ - protected: - // Our win32 implementation relies on this string being mutable. - mutable std::string path; ///< Storage for the path name. - - - /// @} - }; -} - -} - -#endif diff --git a/lib/Support/CMakeLists.txt b/lib/Support/CMakeLists.txt index 6cc8ab236a..7d27a29139 100644 --- a/lib/Support/CMakeLists.txt +++ b/lib/Support/CMakeLists.txt @@ -73,7 +73,6 @@ add_llvm_library(LLVMSupport IncludeFile.cpp Memory.cpp Mutex.cpp - Path.cpp PathV2.cpp Process.cpp Program.cpp @@ -90,7 +89,6 @@ add_llvm_library(LLVMSupport Unix/Host.inc Unix/Memory.inc Unix/Mutex.inc - Unix/Path.inc Unix/PathV2.inc Unix/Process.inc Unix/Program.inc @@ -104,7 +102,6 @@ add_llvm_library(LLVMSupport Windows/Host.inc Windows/Memory.inc Windows/Mutex.inc - Windows/Path.inc Windows/PathV2.inc Windows/Process.inc Windows/Program.inc diff --git a/lib/Support/Path.cpp b/lib/Support/Path.cpp deleted file mode 100644 index 8e229ab88a..0000000000 --- a/lib/Support/Path.cpp +++ /dev/null @@ -1,78 +0,0 @@ -//===-- Path.cpp - Implement OS Path Concept --------------------*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This header file implements the operating system Path concept. -// -//===----------------------------------------------------------------------===// - -#include "llvm/Support/Path.h" -#include "llvm/Config/config.h" -#include "llvm/Support/Endian.h" -#include "llvm/Support/FileSystem.h" -#include "llvm/Support/PathV1.h" -#include <cassert> -#include <cstring> -#include <ostream> -using namespace llvm; -using namespace sys; -namespace { -using support::ulittle32_t; -} - -//===----------------------------------------------------------------------===// -//=== WARNING: Implementation here must contain only TRULY operating system -//=== independent code. -//===----------------------------------------------------------------------===// - -bool Path::operator==(const Path &that) const { - return path == that.path; -} - -bool Path::operator<(const Path& that) const { - return path < that.path; -} - -bool -Path::isArchive() const { - fs::file_magic type; - if (fs::identify_magic(str(), type)) - return false; - return type == fs::file_magic::archive; -} - -bool -Path::isDynamicLibrary() const { - fs::file_magic type; - if (fs::identify_magic(str(), type)) - return false; - switch (type) { - default: return false; - case fs::file_magic::macho_fixed_virtual_memory_shared_lib: - case fs::file_magic::macho_dynamically_linked_shared_lib: - case fs::file_magic::macho_dynamically_linked_shared_lib_stub: - case fs::file_magic::elf_shared_object: - case fs::file_magic::pecoff_executable: return true; - } -} - -void -Path::appendSuffix(StringRef suffix) { - if (!suffix.empty()) { - path.append("."); - path.append(suffix); - } -} - -// Include the truly platform-specific parts of this class. -#if defined(LLVM_ON_UNIX) -#include "Unix/Path.inc" -#endif -#if defined(LLVM_ON_WIN32) -#include "Windows/Path.inc" -#endif diff --git a/lib/Support/Unix/Path.inc b/lib/Support/Unix/Path.inc deleted file mode 100644 index 29ce9cb3fb..0000000000 --- a/lib/Support/Unix/Path.inc +++ /dev/null @@ -1,496 +0,0 @@ -//===- llvm/Support/Unix/Path.cpp - Unix Path Implementation -----*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file implements the Unix specific portion of the Path class. -// -//===----------------------------------------------------------------------===// - -//===----------------------------------------------------------------------===// -//=== WARNING: Implementation here must contain only generic UNIX code that -//=== is guaranteed to work on *all* UNIX variants. -//===----------------------------------------------------------------------===// - -#include "Unix.h" -#if HAVE_SYS_STAT_H -#include <sys/stat.h> -#endif -#if HAVE_FCNTL_H -#include <fcntl.h> -#endif -#ifdef HAVE_SYS_MMAN_H -#include <sys/mman.h> -#endif -#ifdef HAVE_SYS_STAT_H -#include <sys/stat.h> -#endif -#if HAVE_UTIME_H -#include <utime.h> -#endif -#if HAVE_TIME_H -#include <time.h> -#endif -#if HAVE_DIRENT_H -# include <dirent.h> -# define NAMLEN(dirent) strlen((dirent)->d_name) -#else -# define dirent direct -# define NAMLEN(dirent) (dirent)->d_namlen -# if HAVE_SYS_NDIR_H -# include <sys/ndir.h> -# endif -# if HAVE_SYS_DIR_H -# include <sys/dir.h> -# endif -# if HAVE_NDIR_H -# include <ndir.h> -# endif -#endif - -#if HAVE_DLFCN_H -#include <dlfcn.h> -#endif - -#ifdef __APPLE__ -#include <mach-o/dyld.h> -#endif - -// For GNU Hurd -#if defined(__GNU__) && !defined(MAXPATHLEN) -# define MAXPATHLEN 4096 -#endif - -// Put in a hack for Cygwin which falsely reports that the mkdtemp function -// is available when it is not. -#ifdef __CYGWIN__ -# undef HAVE_MKDTEMP -#endif - -namespace { -inline bool lastIsSlash(const std::string& path) { - return !path.empty() && path[path.length() - 1] == '/'; -} - -} - -namespace llvm { -using namespace sys; - -Path::Path(StringRef p) - : path(p) {} - -Path::Path(const char *StrStart, unsigned StrLen) - : path(StrStart, StrLen) {} - -Path& -Path::operator=(StringRef that) { - path.assign(that.data(), that.size()); - return *this; -} - -bool -Path::isValid() const { - // Empty paths are considered invalid here. - // This code doesn't check MAXPATHLEN because there's no need. Nothing in - // LLVM manipulates Paths with fixed-sizes arrays, and if the OS can't - // handle names longer than some limit, it'll report this on demand using - // ENAMETOLONG. - return !path.empty(); -} - -Path -Path::GetTemporaryDirectory(std::string *ErrMsg) { -#if defined(HAVE_MKDTEMP) - // The best way is with mkdtemp but that's not available on many systems, - // Linux and FreeBSD have it. Others probably won't. - char pathname[] = "/tmp/llvm_XXXXXX"; - if (0 == mkdtemp(pathname)) { - MakeErrMsg(ErrMsg, - std::string(pathname) + ": can't create temporary directory"); - return Path(); - } - return Path(pathname); -#elif defined(HAVE_MKSTEMP) - // If no mkdtemp is available, mkstemp can be used to create a temporary file - // which is then removed and created as a directory. We prefer this over - // mktemp because of mktemp's inherent security and threading risks. We still - // have a slight race condition from the time the temporary file is created to - // the time it is re-created as a directoy. - char pathname[] = "/tmp/llvm_XXXXXX"; - int fd = 0; - if (-1 == (fd = mkstemp(pathname))) { - MakeErrMsg(ErrMsg, - std::string(pathname) + ": can't create temporary directory"); - return Path(); - } - ::close(fd); - ::unlink(pathname); // start race condition, ignore errors - if (-1 == ::mkdir(pathname, S_IRWXU)) { // end race condition - MakeErrMsg(ErrMsg, - std::string(pathname) + ": can't create temporary directory"); - return Path(); - } - return Path(pathname); -#elif defined(HAVE_MKTEMP) - // If a system doesn't have mkdtemp(3) or mkstemp(3) but it does have - // mktemp(3) then we'll assume that system (e.g. AIX) has a reasonable - // implementation of mktemp(3) and doesn't follow BSD 4.3's lead of replacing - // the XXXXXX with the pid of the process and a letter. That leads to only - // twenty six temporary files that can be generated. - char pathname[] = "/tmp/llvm_XXXXXX"; - char *TmpName = ::mktemp(pathname); - if (TmpName == 0) { - MakeErrMsg(ErrMsg, - std::string(TmpName) + ": can't create unique directory name"); - return Path(); - } - if (-1 == ::mkdir(TmpName, S_IRWXU)) { - MakeErrMsg(ErrMsg, - std::string(TmpName) + ": can't create temporary directory"); - return Path(); - } - return Path(TmpName); -#else - // This is the worst case implementation. tempnam(3) leaks memory unless its - // on an SVID2 (or later) system. On BSD 4.3 it leaks. tmpnam(3) has thread - // issues. The mktemp(3) function doesn't have enough variability in the - // temporary name generated. So, we provide our own implementation that - // increments an integer from a random number seeded by the current time. This - // should be sufficiently unique that we don't have many collisions between - // processes. Generally LLVM processes don't run very long and don't use very - // many temporary files so this shouldn't be a big issue for LLVM. - static time_t num = ::time(0); - char pathname[MAXPATHLEN]; - do { - num++; - sprintf(pathname, "/tmp/llvm_%010u", unsigned(num)); - } while ( 0 == access(pathname, F_OK ) ); - if (-1 == ::mkdir(pathname, S_IRWXU)) { - MakeErrMsg(ErrMsg, - std::string(pathname) + ": can't create temporary directory"); - return Path(); - } - return Path(pathname); -#endif -} - -Path -Path::GetCurrentDirectory() { - char pathname[MAXPATHLEN]; - if (!getcwd(pathname, MAXPATHLEN)) { - assert(false && "Could not query current working directory."); - return Path(); - } - - return Path(pathname); -} - -bool -Path::exists() const { - return 0 == access(path.c_str(), F_OK ); -} - -bool -Path::isDirectory() const { - struct stat buf; - if (0 != stat(path.c_str(), &buf)) - return false; - return ((buf.st_mode & S_IFMT) == S_IFDIR) ? true : false; -} - -bool -Path::isSymLink() const { - struct stat buf; - if (0 != lstat(path.c_str(), &buf)) - return false; - return S_ISLNK(buf.st_mode); -} - -bool -Path::isRegularFile() const { - // Get the status so we can determine if it's a file or directory - struct stat buf; - - if (0 != stat(path.c_str(), &buf)) - return false; - - if (S_ISREG(buf.st_mode)) - return true; - - return false; -} - -static bool AddPermissionBits(const Path &File, int bits) { - // Get the umask value from the operating system. We want to use it - // when changing the file's permissions. Since calling umask() sets - // the umask and returns its old value, we must call it a second - // time to reset it to the user's preference. - int mask = umask(0777); // The arg. to umask is arbitrary. - umask(mask); // Restore the umask. - - // Get the file's current mode. - struct stat buf; - if (0 != stat(File.c_str(), &buf)) - return false; - // Change the file to have whichever permissions bits from 'bits' - // that the umask would not disable. - if ((chmod(File.c_str(), (buf.st_mode | (bits & ~mask)))) == -1) - return false; - return true; -} - -bool Path::makeReadableOnDisk(std::string* ErrMsg) { - if (!AddPermissionBits(*this, 0444)) - return MakeErrMsg(ErrMsg, path + ": can't make file readable"); - return false; -} - -bool Path::makeWriteableOnDisk(std::string* ErrMsg) { - if (!AddPermissionBits(*this, 0222)) - return MakeErrMsg(ErrMsg, path + ": can't make file writable"); - return false; -} - -bool -Path::set(StringRef a_path) { - if (a_path.empty()) - return false; - path = a_path; - return true; -} - -bool -Path::appendComponent(StringRef name) { - if (name.empty()) - return false; - if (!lastIsSlash(path)) - path += '/'; - path += name; - return true; -} - -bool -Path::eraseComponent() { - size_t slashpos = path.rfind('/',path.size()); - if (slashpos == 0 || slashpos == std::string::npos) { - path.erase(); - return true; - } - if (slashpos == path.size() - 1) - slashpos = path.rfind('/',slashpos-1); - if (slashpos == std::string::npos) { - path.erase(); - return true; - } - path.erase(slashpos); - return true; -} - -bool -Path::eraseSuffix() { - size_t dotpos = path.rfind('.',path.size()); - size_t slashpos = path.rfind('/',path.size()); - if (dotpos != std::string::npos) { - if (slashpos == std::string::npos || dotpos > slashpos+1) { - path.erase(dotpos, path.size()-dotpos); - return true; - } - } - return false; -} - -static bool createDirectoryHelper(char* beg, char* end, bool create_parents) { - - if (access(beg, R_OK | W_OK) == 0) - return false; - - if (create_parents) { - - char* c = end; - - for (; c != beg; --c) - if (*c == '/') { - - // Recurse to handling the parent directory. - *c = '\0'; - bool x = createDirectoryHelper(beg, c, create_parents); - *c = '/'; - - // Return if we encountered an error. - if (x) - return true; - - break; - } - } - - return mkdir(beg, S_IRWXU | S_IRWXG) != 0; -} - -bool -Path::createDirectoryOnDisk( bool create_parents, std::string* ErrMsg ) { - // Get a writeable copy of the path name - std::string pathname(path); - - // Null-terminate the last component - size_t lastchar = path.length() - 1 ; - - if (pathname[lastchar] != '/') - ++lastchar; - - pathname[lastchar] = '\0'; - - if (createDirectoryHelper(&pathname[0], &pathname[lastchar], create_parents)) - return MakeErrMsg(ErrMsg, pathname + ": can't create directory"); - - return false; -} - -bool -Path::createTemporaryFileOnDisk(bool reuse_current, std::string* ErrMsg) { - // Make this into a unique file name - if (makeUnique( reuse_current, ErrMsg )) - return true; - - // create the file - int fd = ::open(path.c_str(), O_WRONLY|O_CREAT|O_TRUNC, 0666); - if (fd < 0) - return MakeErrMsg(ErrMsg, path + ": can't create temporary file"); - ::close(fd); - return false; -} - -bool -Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const { - // Get the status so we can determine if it's a file or directory. - struct stat buf; - if (0 != stat(path.c_str(), &buf)) { - MakeErrMsg(ErrStr, path + ": can't get status of file"); - return true; - } - - // Note: this check catches strange situations. In all cases, LLVM should - // only be involved in the creation and deletion of regular files. This - // check ensures that what we're trying to erase is a regular file. It - // effectively prevents LLVM from erasing things like /dev/null, any block - // special file, or other things that aren't "regular" files. - if (S_ISREG(buf.st_mode)) { - if (unlink(path.c_str()) != 0) - return MakeErrMsg(ErrStr, path + ": can't destroy file"); - return false; - } - - if (!S_ISDIR(buf.st_mode)) { - if (ErrStr) *ErrStr = "not a file or directory"; - return true; - } - - if (remove_contents) { - // Recursively descend the directory to remove its contents. - std::string cmd = "/bin/rm -rf " + path; - if (system(cmd.c_str()) != 0) { - MakeErrMsg(ErrStr, path + ": failed to recursively remove directory."); - return true; - } - return false; - } - - // Otherwise, try to just remove the one directory. - std::string pathname(path); - size_t lastchar = path.length() - 1; - if (pathname[lastchar] == '/') - pathname[lastchar] = '\0'; - else - pathname[lastchar+1] = '\0'; - - if (rmdir(pathname.c_str()) != 0) - return MakeErrMsg(ErrStr, pathname + ": can't erase directory"); - return false; -} - -bool -Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) { - if (0 != ::rename(path.c_str(), newName.c_str())) - return MakeErrMsg(ErrMsg, std::string("can't rename '") + path + "' as '" + - newName.str() + "'"); - return false; -} - -bool -Path::setStatusInfoOnDisk(const FileStatus &si, std::string *ErrStr) const { - struct utimbuf utb; - utb.actime = si.modTime.toPosixTime(); - utb.modtime = utb.actime; - if (0 != ::utime(path.c_str(),&utb)) - return MakeErrMsg(ErrStr, path + ": can't set file modification time"); - if (0 != ::chmod(path.c_str(),si.mode)) - return MakeErrMsg(ErrStr, path + ": can't set mode"); - return false; -} - -bool -Path::makeUnique(bool reuse_current, std::string* ErrMsg) { - bool Exists; - if (reuse_current && (fs::exists(path, Exists) || !Exists)) - return false; // File doesn't exist already, just use it! - - // Append an XXXXXX pattern to the end of the file for use with mkstemp, - // mktemp or our own implementation. - // This uses std::vector instead of SmallVector to avoid a dependence on - // libSupport. And performance isn't critical here. - std::vector<char> Buf; - Buf.resize(path.size()+8); - char *FNBuffer = &Buf[0]; - path.copy(FNBuffer,path.size()); - bool isdir; - if (!fs::is_directory(path, isdir) && isdir) - strcpy(FNBuffer+path.size(), "/XXXXXX"); - else - strcpy(FNBuffer+path.size(), "-XXXXXX"); - -#if defined(HAVE_MKSTEMP) - int TempFD; - if ((TempFD = mkstemp(FNBuffer)) == -1) - return MakeErrMsg(ErrMsg, path + ": can't make unique filename"); - - // We don't need to hold the temp file descriptor... we will trust that no one - // will overwrite/delete the file before we can open it again. - close(TempFD); - - // Save the name - path = FNBuffer; - - // By default mkstemp sets the mode to 0600, so update mode bits now. - AddPermissionBits (*this, 0666); -#elif defined(HAVE_MKTEMP) - // If we don't have mkstemp, use the old and obsolete mktemp function. - if (mktemp(FNBuffer) == 0) - return MakeErrMsg(ErrMsg, path + ": can't make unique filename"); - - // Save the name - path = FNBuffer; -#else - // Okay, looks like we have to do it all by our lonesome. - static unsigned FCounter = 0; - // Try to initialize with unique value. - if (FCounter == 0) FCounter = ((unsigned)getpid() & 0xFFFF) << 8; - char* pos = strstr(FNBuffer, "XXXXXX"); - do { - if (++FCounter > 0xFFFFFF) { - return MakeErrMsg(ErrMsg, - path + ": can't make unique filename: too many files"); - } - sprintf(pos, "%06X", FCounter); - path = FNBuffer; - } while (exists()); - // POSSIBLE SECURITY BUG: An attacker can easily guess the name and exploit - // LLVM. -#endif - return false; -} -} // end llvm namespace diff --git a/lib/Support/Windows/Path.inc b/lib/Support/Windows/Path.inc deleted file mode 100644 index 423c038504..0000000000 --- a/lib/Support/Windows/Path.inc +++ /dev/null @@ -1,587 +0,0 @@ -//===- llvm/Support/Win32/Path.cpp - Win32 Path Implementation ---*- C++ -*-===// -// -// The LLVM Compiler Infrastructure -// -// This file is distributed under the University of Illinois Open Source -// License. See LICENSE.TXT for details. -// -//===----------------------------------------------------------------------===// -// -// This file provides the Win32 specific implementation of the Path class. -// -//===----------------------------------------------------------------------===// - -//===----------------------------------------------------------------------===// -//=== WARNING: Implementation here must contain only generic Win32 code that -//=== is guaranteed to work on *all* Win32 variants. -//===----------------------------------------------------------------------===// - -#include "Windows.h" -#include <cstdio> -#include <malloc.h> - -// We need to undo a macro defined in Windows.h, otherwise we won't compile: -#undef GetCurrentDirectory - -// Windows happily accepts either forward or backward slashes, though any path -// returned by a Win32 API will have backward slashes. As LLVM code basically -// assumes forward slashes are used, backward slashs are converted where they -// can be introduced into a path. -// -// Another invariant is that a path ends with a slash if and only if the path -// is a root directory. Any other use of a trailing slash is stripped. Unlike -// in Unix, Windows has a rather complicated notion of a root path and this -// invariant helps simply the code. - -static void FlipBackSlashes(std::string& s) { - for (size_t i = 0; i < s.size(); i++) - if (s[i] == '\\') - s[i] = '/'; -} - -namespace llvm { -namespace sys { - -Path::Path(llvm::StringRef p) - : path(p) { - FlipBackSlashes(path); -} - -Path::Path(const char *StrStart, unsigned StrLen) - : path(StrStart, StrLen) { - FlipBackSlashes(path); -} - -Path& -Path::operator=(StringRef that) { - path.assign(that.data(), that.size()); - FlipBackSlashes(path); - return *this; -} - -bool -Path::isValid() const { - if (path.empty()) - return false; - - size_t len = path.size(); - // If there is a null character, it and all its successors are ignored. - size_t pos = path.find_first_of('\0'); - if (pos != std::string::npos) - len = pos; - - // If there is a colon, it must be the second character, preceded by a letter - // and followed by something. - pos = path.rfind(':',len); - size_t rootslash = 0; - if (pos != std::string::npos) { - if (pos != 1 || !isalpha(static_cast<unsigned char>(path[0])) || len < 3) - return false; - rootslash = 2; - } - - // Look for a UNC path, and if found adjust our notion of the root slash. - if (len > 3 && path[0] == '/' && path[1] == '/') { - rootslash = path.find('/', 2); - if (rootslash == std::string::npos) - rootslash = 0; - } - - // Check for illegal characters. - if (path.find_first_of("\\<>\"|\001\002\003\004\005\006\007\010\011\012" - "\013\014\015\016\017\020\021\022\023\024\025\026" - "\027\030\031\032\033\034\035\036\037") - != std::string::npos) - return false; - - // Remove trailing slash, unless it's a root slash. - if (len > rootslash+1 && path[len-1] == '/') - path.erase(--len); - - // Check each component for legality. - for (pos = 0; pos < len; ++pos) { - // A component may not end in a space. - if (path[pos] == ' ') { - if (pos+1 == len || path[pos+1] == '/' || path[pos+1] == '\0') - return false; - } - - // A component may not end in a period. - if (path[pos] == '.') { - if (pos+1 == len || path[pos+1] == '/') { - // Unless it is the pseudo-directory "."... - if (pos == 0 || path[pos-1] == '/' || path[pos-1] == ':') - return true; - // or "..". - if (pos > 0 && path[pos-1] == '.') { - if (pos == 1 || path[pos-2] == '/' || path[pos-2] == ':') - return true; - } - return false; - } - } - } - - return true; -} - -void Path::makeAbsolute() { - TCHAR FullPath[MAX_PATH + 1] = {0}; - LPTSTR FilePart = NULL; - - DWORD RetLength = ::GetFullPathNameA(path.c_str(), - sizeof(FullPath)/sizeof(FullPath[0]), - FullPath, &FilePart); - - if (0 == RetLength) { - // FIXME: Report the error GetLastError() - assert(0 && "Unable to make absolute path!"); - } else if (RetLength > MAX_PATH) { - // FIXME: Report too small buffer (needed RetLength bytes). - assert(0 && "Unable to make absolute path!"); - } else { - path = FullPath; - } -} - -static Path *TempDirectory; - -Path -Path::GetTemporaryDirectory(std::string* ErrMsg) { - if (TempDirectory) { -#if defined(_MSC_VER) - // Visual Studio gets confused and emits a diagnostic about calling exists, - // even though this is the implementation for PathV1. Temporarily - // disable the deprecated warning message - #pragma warning(push) - #pragma warning(disable:4996) -#endif - assert(TempDirectory->exists() && "Who has removed TempDirectory?"); -#if defined(_MSC_VER) - #pragma warning(pop) -#endif - return *TempDirectory; - } - - char pathname[MAX_PATH]; - if (!GetTempPath(MAX_PATH, pathname)) { - if (ErrMsg) - *ErrMsg = "Can't determine temporary directory"; - return Path(); - } - - Path result; - result.set(pathname); - - // Append a subdirectory based on our process id so multiple LLVMs don't - // step on each other's toes. -#ifdef __MINGW32__ - // Mingw's Win32 header files are broken. - sprintf(pathname, "LLVM_%u", unsigned(GetCurrentProcessId())); -#else - sprintf(pathname, "LLVM_%u", GetCurrentProcessId()); -#endif - result.appendComponent(pathname); - - // If there's a directory left over from a previous LLVM execution that - // happened to have the same process id, get rid of it. - result.eraseFromDisk(true); - - // And finally (re-)create the empty directory. - result.createDirectoryOnDisk(false); - TempDirectory = new Path(result); - return *TempDirectory; -} - -Path -Path::GetCurrentDirectory() { - char pathname[MAX_PATH]; - ::GetCurrentDirectoryA(MAX_PATH,pathname); - return Path(pathname); -} - -// FIXME: the above set of functions don't map to Windows very well. - -bool -Path::exists() const { - DWORD attr = GetFileAttributes(path.c_str()); - return attr != INVALID_FILE_ATTRIBUTES; -} - -bool -Path::isDirectory() const { - DWORD attr = GetFileAttributes(path.c_str()); - return (attr != INVALID_FILE_ATTRIBUTES) && - (attr & FILE_ATTRIBUTE_DIRECTORY); -} - -bool -Path::isSymLink() const { - DWORD attributes = GetFileAttributes(path.c_str()); - - if (attributes == INVALID_FILE_ATTRIBUTES) - // There's no sane way to report this :(. - assert(0 && "GetFileAttributes returned INVALID_FILE_ATTRIBUTES"); - - // This isn't exactly what defines a NTFS symlink, but it is only true for - // paths that act like a symlink. - return attributes & FILE_ATTRIBUTE_REPARSE_POINT; -} - -bool -Path::isRegularFile() const { - bool res; - if (fs::is_regular_file(path, res)) - return false; - return res; -} - -bool Path::makeReadableOnDisk(std::string* ErrMsg) { - // All files are readable on Windows (ignoring security attributes). - return false; -} - -bool Path::makeWriteableOnDisk(std::string* ErrMsg) { - DWORD attr = GetFileAttributes(path.c_str()); - - // If it doesn't exist, we're done. - if (attr == INVALID_FILE_ATTRIBUTES) - return false; - - if (attr & FILE_ATTRIBUTE_READONLY) { - if (!SetFileAttributes(path.c_str(), attr & ~FILE_ATTRIBUTE_READONLY)) { - MakeErrMsg(ErrMsg, std::string(path) + ": Can't make file writable: "); - return true; - } - } - return false; -} - -bool -Path::set(StringRef a_path) { - if (a_path.empty()) - return false; - std::string save(path); - path = a_path; - FlipBackSlashes(path); - if (!isValid()) { - path = save; - return false; - } - return true; -} - -bool -Path::appendComponent(StringRef name) { - if (name.empty()) - return false; - std::string save(path); - if (!path.empty()) { - size_t last = path.size() - 1; - if (path[last] != '/') - path += '/'; - } - path += name; - if (!isValid()) { - path = save; - return false; - } - return true; -} - -bool -Path::eraseComponent() { - size_t slashpos = path.rfind('/',path.size()); - if (slashpos == path.size() - 1 || slashpos == std::string::npos) - return false; - std::string save(path); - path.erase(slashpos); - if (!isValid()) { - path = save; - return false; - } - return true; -} - -bool -Path::eraseSuffix() { - size_t dotpos = path.rfind('.',path.size()); - size_t slashpos = path.rfind('/',path.size()); - if (dotpos != std::string::npos) { - if (slashpos == std::string::npos || dotpos > slashpos+1) { - std::string save(path); - path.erase(dotpos, path.size()-dotpos); - if (!isValid()) { - path = save; - return false; - } - return true; - } - } - return false; -} - -inline bool PathMsg(std::string* ErrMsg, const char* pathname, const char*msg) { - if (ErrMsg) - *ErrMsg = std::string(pathname) + ": " + std::string(msg); - return true; -} - -bool -Path::createDirectoryOnDisk(bool create_parents, std::string* ErrMsg) { - // Get a writeable copy of the path name - size_t len = path.length(); - char *pathname = reinterpret_cast<char *>(_alloca(len+2)); - path.copy(pathname, len); - pathname[len] = 0; - - // Make sure it ends with a slash. - if (len == 0 || pathname[len - 1] != '/') { - pathname[len] = '/'; - pathname[++len] = 0; - } - - // Determine starting point for initial / search. - char *next = pathname; - if (pathname[0] == '/' && pathname[1] == '/') { - // Skip host name. - next = strchr(pathname+2, '/'); - if (next == NULL) - return PathMsg(ErrMsg, pathname, "badly formed remote directory"); - - // Skip share name. - next = strchr(next+1, '/'); - if (next == NULL) - return PathMsg(ErrMsg, pathname,"badly formed remote directory"); - - next++; - if (*next == 0) - return PathMsg(ErrMsg, pathname, "badly formed remote directory"); - - } else { - if (pathname[1] == ':') - next += 2; // skip drive letter - if (*next == '/') - next++; // skip root directory - } - - // If we're supposed to create intermediate directories - if (create_parents) { - // Loop through the directory components until we're done - while (*next) { - next = strchr(next, '/'); - *next = 0; - if (!CreateDirectory(pathname, NULL) && - GetLastError() != ERROR_ALREADY_EXISTS) - return MakeErrMsg(ErrMsg, - std::string(pathname) + ": Can't create directory: "); - *next++ = '/'; - } - } else { - // Drop trailing slash. - pathname[len-1] = 0; - if (!CreateDirectory(pathname, NULL) && - GetLastError() != ERROR_ALREADY_EXISTS) { - return MakeErrMsg(ErrMsg, std::string(pathname) + - ": Can't create directory: "); - } - } - return false; -} - -bool -Path::eraseFromDisk(bool remove_contents, std::string *ErrStr) const { - WIN32_FILE_ATTRIBUTE_DATA fi; - if (!GetFileAttributesEx(path.c_str(), GetFileExInfoStandard, &fi)) - return true; - - if (fi.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY) { - // If it doesn't exist, we're done. - bool Exists; - if (fs::exists(path, Exists) || !Exists) - return false; - - char *pathname = reinterpret_cast<char *>(_alloca(path.length()+3)); - int lastchar = path.length() - 1 ; - path.copy(pathname, lastchar+1); - - // Make path end with '/*'. - if (pathname[lastchar] != '/') - pathname[++lastchar] = '/'; - pathname[lastchar+1] = '*'; - pathname[lastchar+2] = 0; - - if (remove_contents) { - WIN32_FIND_DATA fd; - HANDLE h = FindFirstFile(pathname, &fd); - - // It's a bad idea to alter the contents of a directory while enumerating - // its contents. So build a list of its contents first, then destroy them. - - if (h != INVALID_HANDLE_VALUE) { - std::vector<Path> list; - - do { - if (strcmp(fd.cFileName, ".") == 0) - continue; - if (strcmp(fd.cFileName, "..") == 0) - continue; - - Path aPath(path); - aPath.appendComponent(&fd.cFileName[0]); - list.push_back(aPath); - } while (FindNextFile(h, &fd)); - - DWORD err = GetLastError(); - FindClose(h); - if (err != ERROR_NO_MORE_FILES) { - SetLastError(err); - return MakeErrMsg(ErrStr, path + ": Can't read directory: "); - } - - for (std::vector<Path>::iterator I = list.begin(); I != list.end(); - ++I) { - Path &aPath = *I; - aPath.eraseFromDisk(true); - } - } else { - if (GetLastError() != ERROR_FILE_NOT_FOUND) - return MakeErrMsg(ErrStr, path + ": Can't read directory: "); - } - } - - pathname[lastchar] = 0; - if (!RemoveDirectory(pathname)) - return MakeErrMsg(ErrStr, - std::string(pathname) + ": Can't destroy directory: "); - return false; - } else { - // Read-only files cannot be deleted on Windows. Must remove the read-only - // attribute first. - if (fi.dwFileAttributes & FILE_ATTRIBUTE_READONLY) { - if (!SetFileAttributes(path.c_str(), - fi.dwFileAttributes & ~FILE_ATTRIBUTE_READONLY)) - return MakeErrMsg(ErrStr, path + ": Can't destroy file: "); - } - - if (!DeleteFile(path.c_str())) - return MakeErrMsg(ErrStr, path + ": Can't destroy file: "); - return false; - } -} - -bool -Path::renamePathOnDisk(const Path& newName, std::string* ErrMsg) { - if (!MoveFileEx(path.c_str(), newName.c_str(), MOVEFILE_REPLACE_EXISTING)) - return MakeErrMsg(ErrMsg, "Can't move '" + path + "' to '" + newName.path - + "': "); - return false; -} - -bool -Path::setStatusInfoOnDisk(const FileStatus &si, std::string *ErrMsg) const { - // FIXME: should work on directories also. - if (!si.isFile) { - return true; - } - - HANDLE h = CreateFile(path.c_str(), - FILE_READ_ATTRIBUTES | FILE_WRITE_ATTRIBUTES, - FILE_SHARE_READ | FILE_SHARE_WRITE | FILE_SHARE_DELETE, - NULL, - OPEN_EXISTING, - FILE_ATTRIBUTE_NORMAL, - NULL); - if (h == INVALID_HANDLE_VALUE) - return true; - - BY_HANDLE_FILE_INFORMATION bhfi; - if (!GetFileInformationByHandle(h, &bhfi)) { - DWORD err = GetLastError(); - CloseHandle(h); - SetLastError(err); - return MakeErrMsg(ErrMsg, path + ": GetFileInformationByHandle: "); - } - - ULARGE_INTEGER ui; - ui.QuadPart = si.modTime.toWin32Time(); - FILETIME ft; - ft.dwLowDateTime = ui.LowPart; - ft.dwHighDateTime = ui.HighPart; - BOOL ret = SetFileTime(h, NULL, &ft, &ft); - DWORD err = GetLastError(); - CloseHandle(h); - if (!ret) { - SetLastError(err); - return MakeErrMsg(ErrMsg, path + ": SetFileTime: "); - } - - // Best we can do with Unix permission bits is to interpret the owner - // writable bit. - if (si.mode & 0200) { - if (bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY) { - if (!SetFileAttributes(path.c_str(), - bhfi.dwFileAttributes & ~FILE_ATTRIBUTE_READONLY)) - return MakeErrMsg(ErrMsg, path + ": SetFileAttributes: "); - } - } else { - if (!(bhfi.dwFileAttributes & FILE_ATTRIBUTE_READONLY)) { - if (!SetFileAttributes(path.c_str(), - bhfi.dwFileAttributes | FILE_ATTRIBUTE_READONLY)) - return MakeErrMsg(ErrMsg, path + ": SetFileAttributes: "); - } - } - - return false; -} - -bool -Path::makeUnique(bool reuse_current, std::string* ErrMsg) { - bool Exists; - if (reuse_current && (fs::exists(path, Exists) || !Exists)) - return false; // File doesn't exist already, just use it! - - // Reserve space for -XXXXXX at the end. - char *FNBuffer = (char*) alloca(path.size()+8); - unsigned offset = path.size(); - path.copy(FNBuffer, offset); - - // Find a numeric suffix that isn't used by an existing file. Assume there - // won't be more than 1 million files with the same prefix. Probably a safe - // bet. - static int FCounter = -1; - if (FCounter < 0) { - // Give arbitrary initial seed. - // FIXME: We should use sys::fs::unique_file() in future. - LARGE_INTEGER cnt64; - DWORD x = GetCurrentProcessId(); - x = (x << 16) | (x >> 16); - if (QueryPerformanceCounter(&cnt64)) // RDTSC - x ^= cnt64.HighPart ^ cnt64.LowPart; - FCounter = x % 1000000; - } - do { - sprintf(FNBuffer+offset, "-%06u", FCounter); - if (++FCounter > 999999) - FCounter = 0; - path = FNBuffer; - } while (!fs::exists(path, Exists) && Exists); - return false; -} - -bool -Path::createTemporaryFileOnDisk(bool reuse_current, std::string* ErrMsg) { - // Make this into a unique file name - makeUnique(reuse_current, ErrMsg); - - // Now go and create it - HANDLE h = CreateFile(path.c_str(), GENERIC_WRITE, 0, NULL, CREATE_NEW, - FILE_ATTRIBUTE_NORMAL, NULL); - if (h == INVALID_HANDLE_VALUE) - return MakeErrMsg(ErrMsg, path + ": can't create file"); - - CloseHandle(h); - return false; -} -} -} |